First install: 07 Accord comp- just the diagram for now

I decided to put a carputer in my car 6 months ago. I have had it under the driver seat for the whole time. Well, now I decided its time to move everything to the trunk, along with adding some subs. This is my wiring diagram for now. Anyone see any blatant problems with it?

As you can see the power for the screen is going no where. Would it be best to route this to the back, or maybe splice into the cig lighter in the front? Would I need some kind of inline fuse or something?

I will update with specs and everything later, running late for class!

EDIT: Oh, sorry, I thought I posted this in the Laptops, UMPCs, etc, not the project. Didnt notice in the haste. Mods, feel free to move this. Thanks!